Abstract
The ferrimagnetic spinel shows a variety of magnetic-field-induced phase transitions owing to bond frustration and strong spin-lattice coupling. However, the site-resolved magnetic properties at the respective field-induced phases in high magnetic fields remain elusive. Our soft x-ray magnetic circular dichroism studies up to 40 T directly evidence element-selective magnetic-moment reorientations in the field-induced phases. The complex magnetic structures are further supported by entropy changes extracted from magnetocaloric-effect measurements. Moreover, thermodynamic experiments reveal an unusual tetracritical point in the phase diagram of due to strong spin-lattice coupling.
- Received 4 August 2020
- Revised 3 December 2020
- Accepted 11 January 2021
DOI:https://doi.org/10.1103/PhysRevB.103.L020408
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